Iowa
Sioux County drinking water quality
16 active public water systems serve 38,678 people in Sioux County. 14 are compliant, 2 had at least one EPA violation in the past three years, 0 are designated serious violators, and 0 carry a health flag.
Community water systems
16 systems, largest first| System | Serves | Status | Rules violated, 3 yr | Unresolved |
|---|---|---|---|---|
|
Sioux Center Municipal Water Department Sioux Center |
8,231 | 0 | 0 | |
|
Orange City Municipal Water Department Orange City |
6,267 | 0 | 0 | |
|
Southern Sioux County Rural Water Ireton |
5,420 | 0 | 0 | |
|
Rock Valley Water Supply Rock Valley |
4,059 | 1 | 0 | |
|
Rural Water System #1 Hospers |
3,428 | 1 | 0 | |
|
Hawarden Water Supply Hawarden |
2,700 | 0 | 0 | |
|
Hull Water Supply Hull |
2,384 | 0 | 0 | |
|
Rock Valley Rural Water District Rock Valley |
2,250 | 0 | 0 | |
|
Alton Municipal Water Department Alton |
1,248 | 0 | 0 | |
|
Hospers Municipal Water Dept Hospers |
718 | 0 | 0 | |
|
Boyden Municipal Water Supply Boyden |
709 | 0 | 0 | |
|
Ireton Water Supply Ireton |
590 | 0 | 0 | |
|
Granville Water Supply Granville |
310 | 0 | 0 | |
|
Maurice Municipal Water Supply Maurice |
265 | 0 | 0 | |
|
Matlock Water Supply Matlock |
74 | 0 | 0 | |
|
Lewis and Clark Regional Water System Hull |
25 | 0 | 0 |
Inactive systems (13, no longer operating or reporting)
Kept for the record and excluded from the county totals above. Browse inactive systems.
About this data
Totals cover active systems. Systems serving more than one county are counted in each county. EPA counts the rules a system was in violation of, not the individual violations; one rule can carry several.
Source: the U.S. EPA's Enforcement and Compliance History Online system (ECHO), which publishes the federal Safe Drinking Water Information System. EPA's terms and values are shown as published. The Iowa records are from EPA's data refresh of Oct 7, 2026; EPA refreshes this data quarterly, and states report to EPA with a lag of three to six months, so the newest violations may not appear yet. Retrieved from ECHO on Oct 11, 2026.